Very few updates (<10) are detected by Windows Update wizard in one of the following cases:
- A fresh installation of Parallels Virtuozzo Containers + all PVC updates
- PVC server has not been updated for a very long time, and it is known that there should be more available Windows updates
Changing the TargetGroup registry value for the WSUS client to the lower PVC update helps to retrieve the long list of updates. For example:
The current value is VZU460062:
C:\>reg query HKLM\SOFTWARE\Policies\Microsoft\Windows\Windowsupdate /v TargetGroup HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windowsupdate TargetGroup REG_SZ VZU460062
Change the value to VZU460061:
C:\>reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\Windowsupdate /v TargetGroup /t REG_SZ /d VZU460061 /f The operation completed successfully.
Force updates detection:
wuauclt /resetauthorization /detectnow
(You may need to wait for some time after this command)
See the long list of updates in Windows Update wizard.
Misconfiguration on Parallels WSUS server.
Notify Parallels Support about this incident.
The temporary solution is to install the updates that are detected with the previous TargetGroup value, then change it to the newer one and install the rest of them.